package com.sayimo.maker.commons.utils;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;

/**  
 * @Title: CbcEncrypt.java
 * @Package com.sayimo.bug.module.common.utils
 * @Description:加密
 * @author 田超
 * @date 2017年1月20日 下午2:26:42
 * @version V1.0  
 */
public class CbcEncrypt {
	public static String encrypt(String message) throws Exception {  
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");  
  
        DESKeySpec desKeySpec = new DESKeySpec("so02y60m".getBytes("UTF-8"));  
  
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);  
        IvParameterSpec iv = new IvParameterSpec("91979694".getBytes("UTF-8"));  
        cipher.init(Cipher.PUBLIC_KEY, secretKey, iv);  
  
        return toHexString(cipher.doFinal(message.getBytes("UTF-8")));  
    }  
  
	public static String decrypt(String message, String key) throws Exception {  
	  
	        byte[] bytesrc = convertHexString(message);  
	        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");  
	        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));  
	        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
	        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);  
	        IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));  
	  
	        cipher.init(Cipher.SECRET_KEY, secretKey, iv);  
	  
	        byte[] retByte = cipher.doFinal(bytesrc);  
	        return new String(retByte);  
	    }  
  
	public static byte[] convertHexString(String ss) {  
	        byte digest[] = new byte[ss.length() / 2];  
	        for (int i = 0; i < digest.length; i++) {  
	            String byteString = ss.substring(2 * i, 2 * i + 2);  
	            int byteValue = Integer.parseInt(byteString, 16);  
	            digest[i] = (byte) byteValue;  
	        }  
	  
	        return digest;
	}  

	public static String toHexString(byte b[]) {  
	    StringBuffer hexString = new StringBuffer();  
	    for (int i = 0; i < b.length; i++) {  
	        String plainText = Integer.toHexString(0xff & b[i]);  
	        if (plainText.length() < 2)  
	            plainText = "0" + plainText;  
	        hexString.append(plainText);  
	    }  
	
	    return hexString.toString();  
	}  

	
	public static void main(String[] args) throws Exception {
		System.out.println(encrypt("nidaye"));
	}
}
